> That deduction was worth $100K to a $1M/year income in a 10% State income tax state earner.
What? Income deductions are only worth the marginal tax rate on that income -- ~40% on $100k of income deducted is worth ~$40k. (With the $10k SALT cap, he can still deduct $10k, worth about $4k.) The top bracket being reduced from 40% to 37%, and starting at a higher income threshold, likely saved the same high earner more than $36k.
You’re over mathing here - GP is simply saying that if someone lives in a 10% income tax state and makes 1m, they can deduct $100k from their income (presumably because it was never really theirs).
They specifically make the claim that the TCJA is a net negative for this hypothetical $1M earner in a 10% income tax state, and I don't think that's true.